Answer: Let's be clear on one point, we live in a 3D world. Kids and babies included. We are programmed to perceive 3D accurately during the first year of our lives. And stereo-acuity actually matures between 3-5 years of age.

The two eyes each receives the same image from a slightly different angle - the same principle used for 3D gadgets. Shouldn't 3D viewing then enhance the performance of the visual system? The common complaint of asthenopia [eyestrain and headaches] from viewing 3D is an entirely different matter. Instead of real research on convergence and fusion, Nintendo mimics 3D TV manufactures by issuing simplistic warnings.